4 ms·
> over around 30 years before it's really worth it That is ANCIENT Solar Technology. If you care to read this it actually is Energy payback estimates for roof
by baldfat 11y ago
> over around 30 years before it's really worth it
That is ANCIENT Solar Technology. If you care to read this it actually is
Energy payback estimates for rooftop PV systems are 4, 3, 2,
and 1 years: 4 years for systems using current multicrystalline-silicon
PV modules, 3 years for current thin-film modules,
2 years for anticipated multicrystalline modules, and
1 year for anticipated thin-film modules
http://www.nrel.gov/docs/fy04osti/35489.pdf http://www.nrel.gov/docs/fy04osti/35489.pdf
I think you need to re-research solar technology.
- encoderer 11y agoWait. I have solar and love it. But if your electric bills over a 4 year period do not amount to the install cost of the solar, the technology used is meaningless? And because install costs do not decrease with more efficient tech, and things like the inverters are just as expensive, I certainly cannot pay off my system in 1 year. More like 10 years.
- ghaff 11y ago10-ish years are the kind of payback I saw when I looked into it. My electricity bill is about $100/month--so ~$1K/year is about the most I could save if I bought solar panels. Companies like SolarCity can make the math more complicated. And in all fairness they can probably take advantage of various breaks and subsidies I may not have access to as a consumer. However, it's like a car purchase. I'm skeptical that some lease agreement suddenly makes a purchase sensible that wouldn't be with a straightforward cash on the barrel buy.
- Retric 11y agoEnergy costs are a small fraction of installation costs. EX: You had someone walking around on the roof, which cost a lot more than the 200w or so they where burning doing so.